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(.No Model.)

W. H. LAPAELLE. HOISTING APPARATUS.

No. 592,792. Patented Nov. 2,1897.

I 'II VI mm mmmuu \nmumnm 'NITED STATES PATENT rion.

WILLIAM H. LAFAELLE, OF BOSTON, MASSACHUSETTS, ASSIGNOR OF TWO- TI-IIRDS TO HENRY F. NAPHEN AND HUBERT H. WALDRON, OF SAME PLACE.

HOISTING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 592,792, dated November 2, 1897.

Application filed May 6, 1897. Serial No. 635,406. (No model.)

To all? whom it may concern.-

Be it known that I, WILLIAM H. LAFAELLE,

a citizen of the United States, residing at Bos ton, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Hoisting Apparatus, of Which'the following is a specification, referencebeing had therein to the accompanying drawings. I

My invention relates to a hoisting apparatus for use in the loading and unloading of coal, grain, and like material; and its object is to provide means to handle two buckets or receptacles alternately, using a winding-drum for each, said winding-drums being loose upon the driving-shaft and adapted to be engaged with said shaft by suitable friction devices operated through proper connections to alternately engage the hoisting-drums with the driving-shaft and thus operate the device to hoist one bucket or receptacle while the other bucket is being returned empty.

In the accompanying drawings I have shown in Figure 1 a side elevation of one form of my invention, and in Fig. 2 a side view of a modification showing a different form of clutch and means for operating the same, and Fig. 3 is an end view of the same.

In Fig. 1 the main driving-shaft is shown at G and carries the ordinary fast and loose pulleys E and F at one end. The shaft is supported in suitable bearings B B and carries hoisting-drums O 0, both loose on the shaft and having a I limited amount of play between collars a. Each drum is adapted to receive the end of the rope or chain 1, the other end of which is adapted to engagethe bucket or other receptacle. Each drum has a reduced portion D, also adapted to receive the end of a rope or chain 2, which is connected at its opposite end-with a weight 3. On the opposing faces of the drums a cylindrical friction-surface is formed extending beyond the winding part, as shown at 0. Im-

mediately in front of the friction-surface of each drum is an arm (1, rigidly mounted on the shaft and serving to support frictionshoes 6, pivoted on the ends of clutch-levers f. These levers f are curved downwardly toward the shaft, as they are adapted to be engaged by a sleeve K, carried in a frame composed of parallel sides and end cars 9 g h 71.

The sleeve K has tapered ends, and as the frame carrying it is moved in one direction or the other the: sleeve engages the arms of the clutches, lifting them and applying the shoes tightly in contact with the friction-surface 0 of the winding-drum, and when thus engaged the drum rotates with the shaft and the hoisting of the bucket is effected. After the bucket or other receptacle has been hoisted and its load removed or dumped the weight on the supplemental drum which lifts With the bucket then begins to descend to lower the bucket, the descent being accelerated by the Weight of the bucket. I provide for the reciprocation of the frame to alternately throw in first one clutch and then the other to cause first one drum and then the other to operate by the use of a crown-wheel A, rotated by the engagement therewith of a projection J toothed upon its end and secured to the shaft G, so as to rotate therewith. The rotation of the crown-wheel is utilized to transmit reciprocating motion to the frame, operating the clutches by the use of a crank I, secured to the shaft of the crownwheel A, and a link H connects the end of the crank I with the end bar 71 of the clutch frame.

It will be understood that the rotation of the shaft and the number of teeth on the crown-wheel will all be regulated according to well-known principles, so as to secure the reciprocation of the frame at just the right moment, so that the drum will operate alternately, and while the fast drum will be hoisting the loose drum will be lowered, and vice versa.

In Figs. 2 and 3 I have shown a modification in which I vary the clutch mechanism, using a form of toggle-levers D, with means for engaging said levers with the frictionsurface of the drum. In order to operate first one drum and then the other, I provide a shaft E, rotated by a gearc', engaging a pinion j on the main shaft G, and carried loosely on the shaft E is a sleeve B, having an arm F, the lower end of the arm F encircling the shaft G Wholly or partly, and in the reciprocation of the sleeve with its arm the clutches are thrown into or out of engagement. The

reciprocation of the sleeve B is effected by a slide-bar 0', having pins k 011 each side of the arm F, and in the reciprocation of the bar C the sleeve is moved. To reciprocate the bar C, I provide a double-face cam A, rotating with the shaft E and contacting with pins Z on the slide-bar O to shift the bar in one direction or the other.

\Vhat I claim is l. A hoisting apparatus comprising a main driving-shaft, the hoisting ropes or chains, the return-weights, drums supported on said shaft and adapted to receive the hoisting ropes or chains, supplemental spools or drums connected with the main drum and adapted to be connected with said return-weights, clutch mechanism for engaging or disengaging the hoisting-drums with the driving-shaft and reciprocating means for throwing said clutch mechanism into or out of engagement, substantially as described.

2. In a hoisting apparatus, a main drivingshaft, hoisting-drums loose on the shaft, return-weights for said-drums, clutch mechanism for engaging said drums with the shaft and means for operating the clutch mechanism alternately comprising a reciprocating device and operating connection from the main shaft to said device, substantially as described.

3. In combination, the main driving-shaft, the standards forming bearings therefor, the drums loosely mounted on said shaft, the clutch mechanisms interposed between the drums, the operating member extending between said clutch mechanisms, and means operated from the driving-shaft for reciprocating said operating member to engage first one clutch mechanism with its drum and then the other, substantially as described.

4. In combination, the main driving-shaft, the standards forming bearings therefor, the drums loosely mounted on said shaft, clutch mechanism interposed between the drums, a reciprocating frame guided in said standards for operating said clutch mechanism and the means for reciprocating said frame.

In testimony whereof I affix my signature in presence of two witnesses.

WVILLIAM H. LAFAELLE.

Witnesses:

C. H. \VELCH,, GEO. E. W. ARMSTRONG. 

